A: Yes. You can export to STL or OBJ. However, tools like Fusion 360 or Blender offer better mesh repair for 3D printing.
The first step? Getting the right version of AutoCAD 3D on your machine. Here is everything you need to know about the download process, system requirements, and which flavor of AutoCAD is best for 3D work. Contrary to popular belief, there is no standalone "AutoCAD 3D" software. 3D capabilities are built into standard AutoCAD. However, you have three legitimate paths:
Intro: Why 2D Isn’t Enough Anymore